Battery Assembly Two-Stage Engaging Mechanism
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Solution Overview
Problem
Electric bicycle batteries often fall off when being removed due to the lack of a secure mechanism, causing damage and inconvenience.
Innovation Solution
A two-stage engaging mechanism with a rotatable second engaging portion on the battery unit, allowing for controlled detachment and reduced space requirements, featuring a torsion spring and movable member for secure holding and easy release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is provided to secure the battery, then the battery can be prevented from falling off, but when the battery is to be removed, users have to hold the battery by one hand and release the locking mechanism by the other hand, resulting in high potential of damaging the battery and inconvenience of operation
Solution Approach 1:
The engaging mechanism is divided into two distinct stages: a first engaging portion that provides initial secure engagement, and a second engaging portion that provides final secure engagement after rotation. This segmentation allows the battery to be held securely during normal operation while enabling controlled, damage-free removal through a two-step disengagement process.
Solution Approach 2:
The second engaging portion is designed to rotate along the end surface of the battery, transitioning from an engaged state to a disengaged state. This dynamic rotation mechanism allows the battery to move from a securely locked position to a removable position, providing both security during operation and ease of removal when needed.
2Volume of moving object
If the second engaging portion is rotatable along the end surface of the battery, then the space required for the engaging mechanism is reduced, but the mechanism becomes more complex
Solution Approach 1:
The first and second engaging portions are integrated into a single battery unit structure, where the second engaging portion rotates relative to the first engaging portion. This merging of multiple engaging functions into one compact unit reduces the overall space required while maintaining the two-stage engagement capability.
Solution Approach 2:
The battery unit's end portion serves multiple functions: it houses both the first and second engaging portions, provides the rotation surface for the second engaging portion, and acts as the interface with the holding member. This multi-functionality reduces the need for separate components, thereby reducing space requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents direct falling of the battery unit, reducing damage and improving operational convenience while minimizing the space needed for the engaging mechanism.
Implementation Method 1
a torsion spring positioned between the positioning portion and the movable member, so that when no external force is exerted on the operation portion, the second engaging portion is maintained close to the first engaging portion. When an external force is exerted on the operation portion, the second engaging portion rotates away from the first engaging portion.
Data Source
AI summary
A battery assembly includes a battery holding unit and a battery unit removably held by the battery holding unit. The battery unit includes a battery, a first engaging portion and a second engaging portion disposed on an end portion of the battery. The battery holding unit includes a holding member selectively engaging with the first engaging portion or the second engaging portion to hold the battery unit at a first position or a second position. When the holding member and the first engaging portion relatively move away from each other, the battery unit moves from the first position to the second position at which the holding member engages with the second engaging portion, and the second engaging portion is allowed to rotate along a surface of the end portion to disengage from the holding member and to remove the battery unit from the battery holding unit.